Subtract 9/70 from 7/63
7/63 - 9/70 is -11/630.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 63 and 70 is 630
Next, find the equivalent fraction of both fractional numbers with denominator 630 - For the 1st fraction, since 63 × 10 = 630,
7/63 = 7 × 10/63 × 10 = 70/630 - Likewise, for the 2nd fraction, since 70 × 9 = 630,
9/70 = 9 × 9/70 × 9 = 81/630 - Subtract the two like fractions:
70/630 - 81/630 = 70 - 81/630 = -11/630
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 14/63-9/70 7/63-18/70 21/63-9/70 7/63-27/70 35/63-9/70 7/63-45/70 49/63-9/70 7/63-63/70